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Taiwan Semiconductor Corporation SMAJ13CAH
- Part No.:
- SMAJ13CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ13CAH.pdf
- Description:
- TVS DIODE 13VWM 21.5VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,164
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Product details
Overview
SMAJ13CAH from Taiwan Semiconductor is a bidirectional 400W transient voltage suppressor (TVS) diode in DO-214AC (SMA) package, designed for automotive-grade surge protection with AEC-Q101 qualification, 13V working stand-off voltage (VWM), 14.4–15.9V breakdown voltage (VBR), and 21.5V clamping voltage (VC) at 18.6A peak pulse current. It protects DC/DC converters and SMPS against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the SMAJ13CAH datasheet, SMAJ13CAH pinout, SMAJ13CAH application, or SMAJ13CAH equivalent, key selection criteria include bidirectional clamping performance under 10/1000μs waveform, AEC-Q101 qualification status, moisture sensitivity level (MSL 1), and compatibility with automated SMT placement on automotive power rails.
Technical Context
The SMAJ13CAH implements a glass-passivated silicon junction optimized for fast transient response (<1.0ps rise time from 0V to VBR min) and low leakage (<1μA at VWM). Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating bus applications without polarity constraints.
It operates across -55°C to +150°C junction temperature range and delivers 400W peak pulse power (10/1000μs) up to 78V VWM; above 78V, derated to 300W. Clamping voltage is specified at IPPM = 18.6A, ensuring predictable overvoltage limiting during load dump or inductive switching events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR min/max | 14.4 V / 15.9 V - Breakdown occurs within this range at 1 mA test current, defining turn-on threshold tolerance |
| VC @ IPPM | 21.5 V - Clamped voltage at 18.6 A peak impulse current, directly limiting downstream component stress |
| PPPM | 400 W - Peak pulse power handling per 10/1000μs waveform, supporting ISO 7637-2 compliance |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage, minimizing quiescent power loss in battery-backed systems |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | DO-214AC (SMA) - Surface-mount outline with 0.060 g mass, UL 94V-0 molding, and matte tin-plated leads |
Pinout & Package
DO-214AC (SMA) package: two-terminal surface-mount device with cathode band marking for unidirectional variants; SMAJ13CAH is bidirectional, so polarity marking indicates terminal symmetry-not directional bias. Leads are matte tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient shunt path | Either terminal serves as clamping node-no polarity dependency; enables placement on differential or floating lines |
| Case (exposed pad none) | Thermal and mechanical interface | No thermal pad; heat dissipation relies on PCB copper area connected to both terminals via recommended pad layout |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including temperature cycling, HTRB, and ESD |
| Fast response time | <1.0 ps from 0 V to VBR min ensures clamping activation before sensitive ICs experience overvoltage damage |
| ISO 7637-2 compliance | Meets Pulse 1 (inductive load disconnect), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line capacitance discharge) |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow-supports standard SMT assembly without special handling |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive, enabling use in environmentally regulated automotive supply chains |
Applications
| Automotive Infotainment Power Rail | Industrial PLC Digital I/O Protection |
|---|---|
Use Scenario: Protects 12V supply input of head unit MCU and audio codec from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional TVS shunts transients exceeding 13V while maintaining low leakage during normal operation. Use Value: Enables direct connection to vehicle battery without external polarity protection or series impedance, reducing BOM count by one diode and one resistor. |
Use Scenario: Shields 24V digital input channels from field-wiring induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Clamps fast-rising ESD and inductive kickback events before they reach optocoupler input stage. Use Value: Maintains signal integrity under IEC 61000-4-2 (±8 kV contact) and IEC 61000-4-4 (±2 kV EFT) without degrading input threshold accuracy. |
| On-board DC/DC Converter Input | LED Driver Supply Line |
Use Scenario: Installed at input of 48V-to-12V buck converter in electric commercial vehicle auxiliary systems. IC Role / Device Role / Timing Role: Absorbs 400W ISO 7637-2 Pulse 5a (load dump) energy within 10/1000μs window. Use Value: Prevents converter latch-up or MOSFET avalanche failure during 35V–60V transient excursions lasting up to 400ms. |
Use Scenario: Safeguards constant-current LED driver IC from flyback spikes generated by long cable runs in street lighting. IC Role / Device Role / Timing Role: Limits reverse voltage across driver output stage during hot-plug or short-circuit recovery. Use Value: Eliminates need for external RC snubber network, reducing board space by 22 mm² and improving thermal reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ13CA | Same DO-214AC package, identical VWM/VBR/VC specs, but not AEC-Q101 qualified; IR = 1 μA same | Lacks automotive qualification-suitable for industrial/commercial only; no ISO 7637-2 validation | Select when automotive qualification is unnecessary and cost sensitivity outweighs qualification assurance |
| Vishay SMAJ13CA-E3/5AT | Identical electrical specs and DO-214AC package; AEC-Q101 qualified; MSL 1; RoHS/halogen-free compliant | Direct functional match with full automotive compliance; differs only in manufacturer traceability and tape/reel packaging | Preferred for dual-sourcing or second-source validation where Taiwan Semiconductor supply continuity is constrained |
Compared with SMAJ13CAH, Littelfuse SMAJ13CA omits AEC-Q101 and ISO 7637-2 validation-limiting use to non-automotive designs-while Vishay SMAJ13CA-E3/5AT matches all critical specifications and qualifications, enabling drop-in replacement where dual sourcing is required.
Availability
SMAJ13CAH is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial PLC I/O modules, and on-board DC/DC converters requiring stable component supply with full AEC-Q101 traceability and ISO 7637-2 compliance.
Supply support for SMAJ13CAH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for automotive and industrial markets.
The SMAJ series was developed specifically for AEC-Q101-compliant transient suppression in 12V/24V/48V automotive subsystems, emphasizing robustness under ISO 7637-2 pulses and compatibility with high-volume SMT assembly.
FAQ
What does the "CAH" suffix indicate in SMAJ13CAH?
The "CAH" suffix in SMAJ13CAH denotes a bidirectional configuration (C), AEC-Q101 qualification (A), and halogen-free construction (H). Unlike unidirectional "CH" variants, SMAJ13CAH provides symmetrical clamping in both polarities-critical for protecting floating or AC-coupled signal/power lines without polarity concerns. This designation is confirmed in TSC's ordering information and electrical specifications table.
Is SMAJ13CAH compatible with lead-free reflow profiles?
Yes, SMAJ13CAH supports standard lead-free reflow per J-STD-020. Its DO-214AC (SMA) package uses matte tin-plated leads rated for soldering per J-STD-002, and its MSL level 1 rating means it can be stored indefinitely at ambient conditions without baking. The device withstands peak temperatures up to 260°C for 10 seconds, aligning with IPC/JEDEC J-STD-020D.3 requirements.
How does SMAJ13CAH perform under repeated transient stress?
SMAJ13CAH is rated for non-repetitive pulses per Fig.5 (10/1000μs waveform); its 400W rating applies to single events. For repetitive surges, derating per Fig.2 is required-e.g., at 75°C ambient, peak power drops to ~280W. The device does not specify repetitive surge endurance; system-level testing per ISO 7637-2 Annex D is recommended to validate lifetime performance under cyclic stress.
Can SMAJ13CAH replace SMAJ13A in an existing design?
No-SMAJ13CAH is bidirectional, while SMAJ13A is unidirectional. Substituting SMAJ13CAH for SMAJ13A introduces symmetrical clamping that may interfere with DC biasing or cause unintended conduction in polarity-sensitive circuits. Always verify circuit topology: SMAJ13CAH requires floating or AC-coupled nodes; SMAJ13A needs defined anode/cathode orientation relative to ground.
What is the maximum clamping voltage of SMAJ13CAH at its rated peak current?
The maximum clamping voltage (VC) of SMAJ13CAH is 21.5 V at 18.6 A peak impulse current (IPPM), measured under the standardized 10/1000μs waveform. This value is guaranteed across the full operating temperature range (-55°C to +150°C) and ensures downstream components see no more than 21.5 V during transient events, provided PCB layout minimizes parasitic inductance in the clamping path.
SMAJ13CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AC, SMA
- Series:
- SMAJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 18.6A
- Power - Peak Pulse:
- 400W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ13CAH FAQ
1.How can I place an order for SMAJ13CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ13CAH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMAJ13CAH reliable?
The price and inventory of SMAJ13CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ13CAH is usually 5 days.
3.What payment methods are accepted for SMAJ13CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ13CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ13CAH?
SMAJ13CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ13CAH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMAJ13CAH?
For technical support, including SMAJ13CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ13CAH requirements.
6.How does Aetrix verify that SMAJ13CAH is sourced from the original manufacturer or authorized distributors?
All SMAJ13CAH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ13CAH meets industry standards.
7.What is the process for return or replacement of SMAJ13CAH?
All SMAJ13CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ13CAH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMAJ13CAH part is unused and in its original packaging.
Return procedure for SMAJ13CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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